SubS Shadows, Cutscenes, Exchange, and Planes (#773)

* Bring code over

* Rename

* clean up variables.h

* Bring over some more code as well as cleanup

* remove newline in functions.h

* format

* Add plane functions

* Remove from actorfixer

* Add some more docs to plane functions

* Use temp for better format

* change func_8013E8F8 to return an s32

* rename origin back to pos

* format

* Add docs to SubS_ComputePlane

* format

* gfxContextPtr -> globalCtx

* bss

* Better docs of SubS_ComputePlane

* Normal -> unitVec

* Review pt. 1

* Update plane comment

* SubS_ActorAndPlayerAreFacing -> SubS_ActorAndPlayerFaceEachOther

* Add subs texture defines

* Update include/z64math.h

Co-authored-by: EllipticEllipsis <elliptic.ellipsis@gmail.com>

Co-authored-by: EllipticEllipsis <elliptic.ellipsis@gmail.com>

28 files changed, 343 insertions, 75 deletions

diff --git a/src/boot_O2_g3/yaz0.c b/src/boot_O2_g3/yaz0.c
index 5f8e5a0ed..80d819acc 100644
--- a/src/boot_O2_g3/yaz0.c
+++ b/src/boot_O2_g3/yaz0.c
@@ -1,4 +1,3 @@
-#include "prevent_bss_reordering.h"
 #include "global.h"
 
 u8 sYaz0DataBuffer[0x400];
diff --git a/src/code/z_en_hy_code.c b/src/code/z_en_hy_code.c
index 6b16cc91c..28c177068 100644
--- a/src/code/z_en_hy_code.c
+++ b/src/code/z_en_hy_code.c
@@ -37,9 +37,9 @@ static AnimationInfoS sAnimations[] = {
 
 s8 gEnHyBodyParts[] = { -1, 1, 12, 13, 14, 9, 10, 11, 0, 6, 7, 8, 3, 4, 5, 2 };
 
-s8 gEnHyBodyPartsIndex[] = { 0, 0, 0, 0, 3, 4, 0, 6, 7, 0, 9, 10, 0, 12, 13 };
+s8 gEnHyParentBodyParts[] = { 0, 0, 0, 0, 3, 4, 0, 6, 7, 0, 9, 10, 0, 12, 13 };
 
-u8 gEnHyShadowSize[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+u8 gEnHyShadowSizes[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 
 s32 EnHy_ChangeAnim(SkelAnime* skelAnime, s16 animIndex) {
     s16 frameCount;
diff --git a/src/code/z_sub_s.c b/src/code/z_sub_s.c
index c36365d48..b51de4897 100644
--- a/src/code/z_sub_s.c
+++ b/src/code/z_sub_s.c
@@ -10,7 +10,7 @@ s16 sPathDayFlags[] = { 0x40, 0x20, 0x10, 8, 4, 2, 1, 0 };
 
 #include "code/sub_s/sub_s.c"
 
-Vec3f D_801C5DB0 = { 1.0f, 1.0f, 1.0f };
+Vec3f gOneVec3f = { 1.0f, 1.0f, 1.0f };
 
 s32 D_801C5DBC[] = { 0, 1 }; // Unused
 
@@ -158,7 +158,15 @@ Gfx* SubS_DrawTransformFlex(GlobalContext* globalCtx, void** skeleton, Vec3s* jo
     return gfx;
 }
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/z_sub_s/func_8013AD6C.s")
+s32 SubS_InCsMode(GlobalContext* globalCtx) {
+    s32 inCsMode = false;
+
+    if (Play_InCsMode(globalCtx)) {
+        inCsMode = true;
+    }
+
+    return inCsMode;
+}
 
 #pragma GLOBAL_ASM("asm/non_matchings/code/z_sub_s/func_8013AD9C.s")
 
@@ -333,13 +341,189 @@ s32 SubS_CopyPointFromPathCheckBounds(Path* path, s32 pointIndex, Vec3f* dst) {
     return true;
 }
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/z_sub_s/func_8013C964.s")
+//! TODO: Needs docs with func_800B8500
+s32 func_8013C964(Actor* actor, GlobalContext* globalCtx, f32 xzRange, f32 yRange, s32 itemId, s32 type) {
+    s32 ret = false;
+    s16 x;
+    s16 y;
+    f32 xzDistToPlayerTemp;
+
+    Actor_GetScreenPos(globalCtx, actor, &x, &y);
+
+    switch (type) {
+        case 1:
+            yRange = fabsf(actor->playerHeightRel) + 1.0f;
+            xzRange = actor->xzDistToPlayer + 1.0f;
+            ret = Actor_PickUp(actor, globalCtx, itemId, xzRange, yRange);
+            break;
+        case 2:
+            if ((fabsf(actor->playerHeightRel) <= yRange) && (actor->xzDistToPlayer <= xzRange)) {
+                ret = func_800B8500(actor, globalCtx, xzRange, yRange, itemId);
+            }
+            break;
+        case 3:
+            //! @bug: Both x and y conditionals are always true, || should be an &&
+            if (((x >= 0) || (x < SCREEN_WIDTH)) && ((y >= 0) || (y < SCREEN_HEIGHT))) {
+                ret = func_800B8500(actor, globalCtx, xzRange, yRange, itemId);
+            }
+            break;
+        case 4:
+            yRange = fabsf(actor->playerHeightRel) + 1.0f;
+            xzRange = actor->xzDistToPlayer + 1.0f;
+            xzDistToPlayerTemp = actor->xzDistToPlayer;
+            actor->xzDistToPlayer = 0.0f;
+            actor->flags |= 0x10000;
+            ret = func_800B8500(actor, globalCtx, xzRange, yRange, itemId);
+            actor->xzDistToPlayer = xzDistToPlayerTemp;
+            break;
+        case 5:
+            //! @bug: Both x and y conditionals are always true, || should be an &&
+            if (((x >= 0) || (x < SCREEN_WIDTH)) && ((y >= 0) || (y < SCREEN_HEIGHT)) &&
+                (fabsf(actor->playerHeightRel) <= yRange) && (actor->xzDistToPlayer <= xzRange) && actor->isTargeted) {
+                actor->flags |= 0x10000;
+                ret = func_800B8500(actor, globalCtx, xzRange, yRange, itemId);
+            }
+            break;
+        case 6:
+            //! @bug: Both x and y conditionals are always true, || should be an &&
+            if (((x >= 0) || (x < SCREEN_WIDTH)) && ((y >= 0) || (y < SCREEN_HEIGHT)) &&
+                (fabsf(actor->playerHeightRel) <= yRange) && (actor->xzDistToPlayer <= xzRange)) {
+                actor->flags |= 0x10000;
+                ret = func_800B8500(actor, globalCtx, xzRange, yRange, itemId);
+            }
+            break;
+    }
+    return ret;
+}
+
+const u8 sShadowMaps[4][12][12] = {
+    {
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0 },
+        { 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0 },
+        { 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0 },
+        { 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0 },
+        { 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+    },
+    {
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0 },
+        { 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0 },
+        { 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0 },
+        { 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0 },
+        { 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0 },
+        { 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0 },
+        { 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+    },
+    {
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0 },
+        { 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0 },
+        { 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0 },
+        { 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0 },
+        { 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0 },
+        { 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0 },
+        { 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0 },
+        { 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+    },
+    {
+        { 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0 },
+        { 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0 },
+        { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0 },
+        { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0 },
+        { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
+        { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
+        { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
+        { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
+        { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0 },
+        { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0 },
+        { 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0 },
+        { 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0 },
+    },
+};
+
+void SubS_FillShadowTex(s32 startCol, s32 startRow, u8* tex, s32 size) {
+    s32 i;
+    s32 j;
+    s32 start;
+
+    for (i = 0; i < 12; i++) {
+        start = ((startRow + i) * 64) + startCol - 390;
+        for (j = 0; j < 12; j++) {
+            if (sShadowMaps[size][i][j] != 0) {
+                if ((start + j >= 0) && (start + j < SUBS_SHADOW_TEX_SIZE)) {
+                    tex[start + j] = 255;
+                }
+            }
+        }
+    }
+}
+
+void SubS_GenShadowTex(Vec3f bodyPartsPos[], Vec3f* worldPos, u8* tex, f32 tween, u8 bodyPartsNum, u8 sizes[],
+                       s8 parentBodyParts[]) {
+    Vec3f pos;
+    Vec3f startVec;
+    s32 i;
+    s32 parentBodyPart;
+    Vec3f* bodyPartPos;
+    s32 startCol;
+    s32 startRow;
+
+    for (i = 0; i < bodyPartsNum; i++) {
+        if (parentBodyParts[i] >= 0) {
+            parentBodyPart = parentBodyParts[i];
+            bodyPartPos = &bodyPartsPos[i];
+
+            pos.x = (bodyPartsPos[parentBodyPart].x - bodyPartPos->x) * tween + (bodyPartPos->x - worldPos->x);
+            pos.y = (bodyPartsPos[parentBodyPart].y - bodyPartPos->y) * tween + (bodyPartPos->y - worldPos->y);
+            pos.z = (bodyPartsPos[parentBodyPart].z - bodyPartPos->z) * tween + (bodyPartPos->z - worldPos->z);
+        } else {
+            bodyPartPos = &bodyPartsPos[i];
+
+            pos.x = bodyPartPos->x - worldPos->x;
+            pos.y = bodyPartPos->y - worldPos->y;
+            pos.z = bodyPartPos->z - worldPos->z;
+        }
+
+        Matrix_MultiplyVector3fByState(&pos, &startVec);
+        startCol = 64.0f + startVec.x;
+        startRow = 64.0f - startVec.z;
+        SubS_FillShadowTex(startCol >> 1, startRow >> 1, tex, sizes[i]);
+    }
+}
+
+void SubS_DrawShadowTex(Actor* actor, GameState* gameState, u8* tex) {
+    s32 pad;
+    GraphicsContext* gfxCtx = gameState->gfxCtx;
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/z_sub_s/func_8013CC2C.s")
+    OPEN_DISPS(gfxCtx);
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/z_sub_s/func_8013CD64.s")
+    func_8012C28C(gfxCtx);
+    gDPSetPrimColor(POLY_OPA_DISP++, 0, 0, 0, 0, 0, 100);
+    gDPSetEnvColor(POLY_OPA_DISP++, 0, 0, 0, 0);
+    Matrix_InsertTranslation(actor->world.pos.x, 0.0f, actor->world.pos.z, MTXMODE_NEW);
+    Matrix_Scale(0.6f, 1.0f, 0.6f, MTXMODE_APPLY);
+    gSPMatrix(POLY_OPA_DISP++, Matrix_NewMtx(gfxCtx), G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_MODELVIEW);
+    gSPDisplayList(POLY_OPA_DISP++, gShadowDL);
+    gDPLoadTextureBlock(POLY_OPA_DISP++, tex, G_IM_FMT_I, G_IM_SIZ_8b, SUBS_SHADOW_TEX_WIDTH, SUBS_SHADOW_TEX_HEIGHT, 0,
+                        G_TX_NOMIRROR | G_TX_CLAMP, G_TX_NOMIRROR | G_TX_CLAMP, 6, 6, G_TX_NOLOD, G_TX_NOLOD);
+    gSPDisplayList(POLY_OPA_DISP++, gShadowVtxDL);
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/z_sub_s/func_8013CF04.s")
+    CLOSE_DISPS(gfxCtx);
+}
 
 #pragma GLOBAL_ASM("asm/non_matchings/code/z_sub_s/func_8013D0E0.s")
 
@@ -688,9 +872,58 @@ s32 SubS_FillCutscenesList(Actor* actor, s16 cutscenes[], s16 numCutscenes) {
     return i;
 }
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/z_sub_s/func_8013E4B0.s")
+/**
+ * Computes a plane based on a point on the plane, a unit vector and two angles
+ *
+ * @param[in] point a point on the plane
+ * @param[in] unitVec the unit vector rotated that becomes the plane's normal
+ * @param[in] rot the angles to rotate with, uses just the x and y components
+ * @param[out] plane the computed plane
+ *
+ * Notes:
+ *  The unit input vector is expected to already be normalized (only uses are with the z unit vector)
+ *
+ */
+void SubS_ConstructPlane(Vec3f* point, Vec3f* unitVec, Vec3s* rot, Plane* plane) {
+    f32 sin;
+    f32 cos;
+    f32 temp;
+    f32 unitVecZ;
+    f32 normY;
+    f32 unitVecYX;
+
+    sin = Math_SinS(-rot->x);
+    cos = Math_CosS(-rot->x);
+    unitVecZ = unitVec->z;
+    unitVecYX = unitVec->y;
+
+    // Apply a rotation by -x about the X axis
+    temp = (unitVecZ * cos) - (unitVecYX * sin);
+    normY = (unitVecZ * sin) + (unitVecYX * cos);
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/z_sub_s/func_8013E5CC.s")
+    sin = Math_SinS(rot->y);
+    cos = Math_CosS(rot->y);
+    unitVecYX = unitVec->x;
+    plane->normal.y = normY;
+
+    // Apply a rotation by y about the Y axis
+    plane->normal.z = (temp * cos) - (unitVecYX * sin);
+    plane->normal.x = (temp * sin) + (unitVecYX * cos);
+
+    plane->originDist = -((point->x * plane->normal.x) + (plane->normal.y * point->y) + (plane->normal.z * point->z));
+}
+
+s32 SubS_LineSegVsPlane(Vec3f* point, Vec3s* rot, Vec3f* unitVec, Vec3f* linePointA, Vec3f* linePointB,
+                        Vec3f* intersect) {
+    s32 lineSegVsPlane;
+    Plane plane;
+
+    SubS_ConstructPlane(point, unitVec, rot, &plane);
+    lineSegVsPlane = Math3D_LineSegVsPlane(plane.normal.x, plane.normal.y, plane.normal.z, plane.originDist, linePointA,
+                                           linePointB, intersect, false);
+
+    return lineSegVsPlane ? true : false;
+}
 
 /**
  * Finds the first actor instance of a specified Id and category verified with a custom callback.
@@ -714,10 +947,44 @@ Actor* SubS_FindActorCustom(GlobalContext* globalCtx, Actor* actor, Actor* actor
     return actorIter;
 }
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/z_sub_s/func_8013E748.s")
+//! TODO: Needs docs with func_800B8500
+s32 func_8013E748(Actor* actor, GlobalContext* globalCtx, f32 xzRange, f32 yRange, s32 exchangeItemId, void* data,
+                  func_8013E748_VerifyFunc verifyFunc) {
+    s32 ret = false;
+
+    if ((verifyFunc == NULL) || ((verifyFunc != NULL) && verifyFunc(globalCtx, actor, data))) {
+        ret = func_800B8500(actor, globalCtx, xzRange, yRange, exchangeItemId);
+    }
+    return ret;
+}
+
+s32 SubS_ActorAndPlayerFaceEachOther(GlobalContext* globalCtx, Actor* actor, void* data) {
+    Player* player = GET_PLAYER(globalCtx);
+    Vec3s* yawTols = (Vec3s*)data;
+    s16 playerYaw = ABS(BINANG_SUB(Actor_YawBetweenActors(&player->actor, actor), player->actor.shape.rot.y));
+    s16 actorYaw = ABS(BINANG_SUB(actor->yawTowardsPlayer, actor->shape.rot.y));
+    s32 areFacing = false;
+    s32 actorYawTol = ABS(yawTols->y);
+    s32 playerYawTol;
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/z_sub_s/func_8013E7C0.s")
+    if (actorYaw < (s16)actorYawTol) {
+        playerYawTol = ABS(yawTols->x);
+        if (playerYaw < (s16)playerYawTol) {
+            areFacing = true;
+        }
+    }
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/z_sub_s/func_8013E8F8.s")
+    return areFacing;
+}
+
+//! TODO: Needs docs with func_800B8500
+s32 func_8013E8F8(Actor* actor, GlobalContext* globalCtx, f32 xzRange, f32 yRange, s32 exhangeItemId, s16 playerYawTol,
+                  s16 actorYawTol) {
+    Vec3s yawTols;
+
+    yawTols.x = playerYawTol;
+    yawTols.y = actorYawTol;
+    return func_8013E748(actor, globalCtx, xzRange, yRange, exhangeItemId, &yawTols, SubS_ActorAndPlayerFaceEachOther);
+}
 
 #pragma GLOBAL_ASM("asm/non_matchings/code/z_sub_s/func_8013E950.s")
diff --git a/src/overlays/actors/ovl_Boss_02/z_boss_02.c b/src/overlays/actors/ovl_Boss_02/z_boss_02.c
index 7cf9a94b7..4a9061207 100644
--- a/src/overlays/actors/ovl_Boss_02/z_boss_02.c
+++ b/src/overlays/actors/ovl_Boss_02/z_boss_02.c
@@ -4,6 +4,7 @@
  * Description: Twinmold
  */
 
+#include "prevent_bss_reordering.h"
 #include "z_boss_02.h"
 #include "overlays/actors/ovl_Door_Warp1/z_door_warp1.h"
 #include "overlays/actors/ovl_Item_B_Heart/z_item_b_heart.h"
diff --git a/src/overlays/actors/ovl_En_Ah/z_en_ah.c b/src/overlays/actors/ovl_En_Ah/z_en_ah.c
index be25dec24..5f0f7a5b2 100644
--- a/src/overlays/actors/ovl_En_Ah/z_en_ah.c
+++ b/src/overlays/actors/ovl_En_Ah/z_en_ah.c
@@ -541,7 +541,7 @@ void EnAh_Update(Actor* thisx, GlobalContext* globalCtx) {
         radius = this->collider.dim.radius + 60;
         height = this->collider.dim.height + 10;
 
-        func_8013C964(&this->actor, globalCtx, radius, height, 0, this->unk_2D8 & 7);
+        func_8013C964(&this->actor, globalCtx, radius, height, EXCH_ITEM_NONE, this->unk_2D8 & 7);
         if (!(this->unk_2D8 & 0x10)) {
             Actor_MoveWithGravity(&this->actor);
             Actor_UpdateBgCheckInfo(globalCtx, &this->actor, 30.0f, 12.0f, 0.0f, 4);
diff --git a/src/overlays/actors/ovl_En_Al/z_en_al.c b/src/overlays/actors/ovl_En_Al/z_en_al.c
index e86f3971d..259c52614 100644
--- a/src/overlays/actors/ovl_En_Al/z_en_al.c
+++ b/src/overlays/actors/ovl_En_Al/z_en_al.c
@@ -647,7 +647,7 @@ s32 func_80BDF308(EnAl* this, GlobalContext* globalCtx, struct_80133038_arg2* ar
             break;
 
         case 2:
-            this->unk_4F0 = 0;
+            this->unk_4F0 = EXCH_ITEM_NONE;
             this->unk_4EA = 0;
             func_80BDE27C(this, 2);
             break;
@@ -660,7 +660,7 @@ s32 func_80BDF390(EnAl* this, GlobalContext* globalCtx, struct_80133038_arg2* ar
 
     this->actor.flags |= ACTOR_FLAG_1;
     this->actor.targetMode = 0;
-    this->unk_4F0 = 0;
+    this->unk_4F0 = EXCH_ITEM_NONE;
     this->unk_4C2 = 0;
     this->unk_4D4 = 40.0f;
 
diff --git a/src/overlays/actors/ovl_En_Baba/z_en_baba.c b/src/overlays/actors/ovl_En_Baba/z_en_baba.c
index ff2d7c48e..a2f28a6dd 100644
--- a/src/overlays/actors/ovl_En_Baba/z_en_baba.c
+++ b/src/overlays/actors/ovl_En_Baba/z_en_baba.c
@@ -384,7 +384,7 @@ s32 func_80BA9160(EnBaba* this, GlobalContext* globalCtx) {
     this->actor.world.pos.x = sp58.x;
     this->actor.world.pos.z = sp58.z;
 
-    if (func_8013AD6C(globalCtx)) {
+    if (SubS_InCsMode(globalCtx)) {
         sp54 = this->unk_430;
         sp50 = this->unk_42C;
         sp58 = this->actor.world.pos;
@@ -401,7 +401,7 @@ s32 func_80BA9160(EnBaba* this, GlobalContext* globalCtx) {
         this->actor.world.rot.y = Math_Vec3f_Yaw(&sp70, &sp64);
     }
 
-    if (func_8013AD6C(globalCtx)) {
+    if (SubS_InCsMode(globalCtx)) {
         this->unk_430 = sp54;
         this->unk_42C = sp50;
         this->unk_414 = sp58;
diff --git a/src/overlays/actors/ovl_En_Bba_01/z_en_bba_01.c b/src/overlays/actors/ovl_En_Bba_01/z_en_bba_01.c
index e502b6637..883d4dd60 100644
--- a/src/overlays/actors/ovl_En_Bba_01/z_en_bba_01.c
+++ b/src/overlays/actors/ovl_En_Bba_01/z_en_bba_01.c
@@ -308,7 +308,7 @@ void EnBba01_TransformLimbDraw(GlobalContext* globalCtx, s32 limbIndex, Actor* t
 void EnBba01_Draw(Actor* thisx, GlobalContext* globalCtx) {
     EnBba01* this = THIS;
     s32 i;
-    u8* shadowTex = GRAPH_ALLOC(globalCtx->state.gfxCtx, sizeof(u8[64][64]));
+    u8* shadowTex = GRAPH_ALLOC(globalCtx->state.gfxCtx, SUBS_SHADOW_TEX_SIZE);
     u8* shadowTexIter;
 
     OPEN_DISPS(globalCtx->state.gfxCtx);
@@ -322,14 +322,14 @@ void EnBba01_Draw(Actor* thisx, GlobalContext* globalCtx) {
                                    EnBba01_TransformLimbDraw, &this->enHy.actor);
     Matrix_InsertXRotation_s(0, MTXMODE_NEW);
 
-    for (i = 0, shadowTexIter = shadowTex; i < (s32)sizeof(u8[64][64]); i++) {
+    for (i = 0, shadowTexIter = shadowTex; i < SUBS_SHADOW_TEX_SIZE; i++) {
         *shadowTexIter++ = 0;
     }
     for (i = 0; i < 5; i++) {
-        func_8013CD64(this->enHy.bodyPartsPos, &this->enHy.actor.world.pos, shadowTex, i / 5.0f,
-                      ARRAY_COUNT(this->enHy.bodyPartsPos), gEnHyShadowSize, gEnHyBodyPartsIndex);
+        SubS_GenShadowTex(this->enHy.bodyPartsPos, &this->enHy.actor.world.pos, shadowTex, i / 5.0f,
+                          ARRAY_COUNT(this->enHy.bodyPartsPos), gEnHyShadowSizes, gEnHyParentBodyParts);
     }
-    func_8013CF04(&this->enHy.actor, &globalCtx->state.gfxCtx, shadowTex);
+    SubS_DrawShadowTex(&this->enHy.actor, &globalCtx->state, shadowTex);
 
     CLOSE_DISPS(globalCtx->state.gfxCtx);
 }
diff --git a/src/overlays/actors/ovl_En_Cne_01/z_en_cne_01.c b/src/overlays/actors/ovl_En_Cne_01/z_en_cne_01.c
index e7c6ebc6e..53198c594 100644
--- a/src/overlays/actors/ovl_En_Cne_01/z_en_cne_01.c
+++ b/src/overlays/actors/ovl_En_Cne_01/z_en_cne_01.c
@@ -299,7 +299,7 @@ void EnCne01_TransformLimbDraw(GlobalContext* globalCtx, s32 limbIndex, Actor* t
 void EnCne01_Draw(Actor* thisx, GlobalContext* globalCtx) {
     EnCne01* this = THIS;
     s32 i;
-    u8* shadowTex = GRAPH_ALLOC(globalCtx->state.gfxCtx, sizeof(u8[64][64]));
+    u8* shadowTex = GRAPH_ALLOC(globalCtx->state.gfxCtx, SUBS_SHADOW_TEX_SIZE);
     u8* shadowTexIter;
 
     OPEN_DISPS(globalCtx->state.gfxCtx);
@@ -314,14 +314,14 @@ void EnCne01_Draw(Actor* thisx, GlobalContext* globalCtx) {
                                    EnCne01_TransformLimbDraw, &this->enHy.actor);
     Matrix_InsertXRotation_s(0, MTXMODE_NEW);
 
-    for (i = 0, shadowTexIter = shadowTex; i < (s32)sizeof(u8[64][64]); i++) {
+    for (i = 0, shadowTexIter = shadowTex; i < SUBS_SHADOW_TEX_SIZE; i++) {
         *shadowTexIter++ = 0;
     }
     for (i = 0; i < 5; i++) {
-        func_8013CD64(this->enHy.bodyPartsPos, &this->enHy.actor.world.pos, shadowTex, i / 5.0f,
-                      ARRAY_COUNT(this->enHy.bodyPartsPos), gEnHyShadowSize, gEnHyBodyPartsIndex);
+        SubS_GenShadowTex(this->enHy.bodyPartsPos, &this->enHy.actor.world.pos, shadowTex, i / 5.0f,
+                          ARRAY_COUNT(this->enHy.bodyPartsPos), gEnHyShadowSizes, gEnHyParentBodyParts);
     }
-    func_8013CF04(&this->enHy.actor, &globalCtx->state.gfxCtx, shadowTex);
+    SubS_DrawShadowTex(&this->enHy.actor, &globalCtx->state, shadowTex);
 
     CLOSE_DISPS(globalCtx->state.gfxCtx);
 }
diff --git a/src/overlays/actors/ovl_En_Dai/z_en_dai.c b/src/overlays/actors/ovl_En_Dai/z_en_dai.c
index bd7de1418..f8118e199 100644
--- a/src/overlays/actors/ovl_En_Dai/z_en_dai.c
+++ b/src/overlays/actors/ovl_En_Dai/z_en_dai.c
@@ -564,7 +564,7 @@ void EnDai_Update(Actor* thisx, GlobalContext* globalCtx) {
             SkelAnime_Update(&this->skelAnime);
             func_80B3E834(this);
             if (!(this->unk_1CE & 0x200)) {
-                func_8013C964(&this->actor, globalCtx, 0.0f, 0.0f, 0, this->unk_1CE & 7);
+                func_8013C964(&this->actor, globalCtx, 0.0f, 0.0f, EXCH_ITEM_NONE, this->unk_1CE & 7);
             }
             func_80B3E460(this);
         }
diff --git a/src/overlays/actors/ovl_En_Dno/z_en_dno.c b/src/overlays/actors/ovl_En_Dno/z_en_dno.c
index ceffe3d93..e774c8965 100644
--- a/src/overlays/actors/ovl_En_Dno/z_en_dno.c
+++ b/src/overlays/actors/ovl_En_Dno/z_en_dno.c
@@ -149,8 +149,8 @@ void func_80A715DC(EnDno* this, GlobalContext* globalCtx) {
         crace = (BgCraceMovebg*)SubS_FindActor(globalCtx, &crace->actor, ACTORCAT_BG, ACTOR_BG_CRACE_MOVEBG);
         if (crace != NULL) {
             if (ENDNO_GET_F(&crace->actor) == ENDNO_GET_F_0 && !(crace->unk_170 & 1)) {
-                if (func_8013E5CC(&crace->actor.home.pos, &crace->actor.home.rot, &D_80A73B2C, &this->actor.prevPos,
-                                  &this->actor.world.pos, &sp88)) {
+                if (SubS_LineSegVsPlane(&crace->actor.home.pos, &crace->actor.home.rot, &D_80A73B2C,
+                                        &this->actor.prevPos, &this->actor.world.pos, &sp88)) {
                     Math_Vec3f_Diff(&this->actor.world.pos, &crace->actor.home.pos, &sp7C);
                     Matrix_RotateY(-crace->actor.home.rot.y, MTXMODE_NEW);
                     Matrix_MultiplyVector3fByState(&sp7C, &sp70);
diff --git a/src/overlays/actors/ovl_En_Dnp/z_en_dnp.c b/src/overlays/actors/ovl_En_Dnp/z_en_dnp.c
index 13a02345d..3e9bd9f6e 100644
--- a/src/overlays/actors/ovl_En_Dnp/z_en_dnp.c
+++ b/src/overlays/actors/ovl_En_Dnp/z_en_dnp.c
@@ -410,7 +410,7 @@ void EnDnp_Update(Actor* thisx, GlobalContext* globalCtx) {
         if ((this->unk_322 & 0x400) && !(gSaveContext.save.weekEventReg[23] & 0x20)) {
             Actor_PickUp(&this->actor, globalCtx, GI_MAX, sp2C, sp28);
         }
-        func_8013C964(&this->actor, globalCtx, sp2C, sp28, 0, this->unk_322 & 7);
+        func_8013C964(&this->actor, globalCtx, sp2C, sp28, EXCH_ITEM_NONE, this->unk_322 & 7);
         Actor_SetFocus(&this->actor, 30.0f);
         func_80B3CC80(this, globalCtx);
     }
diff --git a/src/overlays/actors/ovl_En_Dnq/z_en_dnq.c b/src/overlays/actors/ovl_En_Dnq/z_en_dnq.c
index 917a2d4d9..ae7f918f1 100644
--- a/src/overlays/actors/ovl_En_Dnq/z_en_dnq.c
+++ b/src/overlays/actors/ovl_En_Dnq/z_en_dnq.c
@@ -455,7 +455,7 @@ void EnDnq_Update(Actor* thisx, GlobalContext* globalCtx) {
         Actor_UpdateBgCheckInfo(globalCtx, &this->actor, 30.0f, 12.0f, 0.0f, 4);
         this->unk_394 = this->actor.xzDistToPlayer;
         func_80A52C6C(this, globalCtx);
-        func_8013C964(&this->actor, globalCtx, this->unk_390, fabsf(this->actor.playerHeightRel) + 1.0f, 0,
+        func_8013C964(&this->actor, globalCtx, this->unk_390, fabsf(this->actor.playerHeightRel) + 1.0f, EXCH_ITEM_NONE,
                       this->unk_37C & 7);
         this->actor.xzDistToPlayer = this->unk_394;
         Actor_SetFocus(&this->actor, 46.0f);
diff --git a/src/overlays/actors/ovl_En_Dns/z_en_dns.c b/src/overlays/actors/ovl_En_Dns/z_en_dns.c
index e2c07cce7..6b7943504 100644
--- a/src/overlays/actors/ovl_En_Dns/z_en_dns.c
+++ b/src/overlays/actors/ovl_En_Dns/z_en_dns.c
@@ -554,7 +554,7 @@ void EnDns_Update(Actor* thisx, GlobalContext* globalCtx) {
         func_8092C934(this);
         func_8092C86C(this, globalCtx);
         Actor_UpdateBgCheckInfo(globalCtx, &this->actor, 30.0f, 12.0f, 0.0f, 4);
-        func_8013C964(&this->actor, globalCtx, 80.0f, 40.0f, 0, this->unk_2C6 & 7);
+        func_8013C964(&this->actor, globalCtx, 80.0f, 40.0f, EXCH_ITEM_NONE, this->unk_2C6 & 7);
         Actor_SetFocus(&this->actor, 34.0f);
         func_8092C6FC(this, globalCtx);
         func_8092C5C0(this);
diff --git a/src/overlays/actors/ovl_En_Dodongo/z_en_dodongo.c b/src/overlays/actors/ovl_En_Dodongo/z_en_dodongo.c
index 20a44c01d..a630a0dcb 100644
--- a/src/overlays/actors/ovl_En_Dodongo/z_en_dodongo.c
+++ b/src/overlays/actors/ovl_En_Dodongo/z_en_dodongo.c
@@ -293,7 +293,7 @@ void EnDodongo_Init(Actor* thisx, GlobalContext* globalCtx) {
     this->unk_330.r = 255;
     this->unk_330.g = 10;
     this->unk_330.a = 200;
-    Math_Vec3f_Copy(&this->unk_314, &D_801C5DB0);
+    Math_Vec3f_Copy(&this->unk_314, &gOneVec3f);
     ActorShape_Init(&this->actor.shape, 0.0f, ActorShadow_DrawCircle, 48.0f);
     SkelAnime_Init(globalCtx, &this->skelAnime, &object_dodongo_Skel_008318, &object_dodongo_Anim_004C20,
                    this->jointTable, this->morphTable, 31);
diff --git a/src/overlays/actors/ovl_En_Gm/z_en_gm.c b/src/overlays/actors/ovl_En_Gm/z_en_gm.c
index 107c9a656..0c80ce319 100644
--- a/src/overlays/actors/ovl_En_Gm/z_en_gm.c
+++ b/src/overlays/actors/ovl_En_Gm/z_en_gm.c
@@ -1363,7 +1363,7 @@ s32 func_80950804(EnGm* this, GlobalContext* globalCtx) {
     f32 temp_f0;
 
     door = func_8094DF90(globalCtx, this->unk_258);
-    if (!func_8013AD6C(globalCtx) && (this->unk_3C4 != 0)) {
+    if (!SubS_InCsMode(globalCtx) && (this->unk_3C4 != 0)) {
         if ((door != NULL) && (door->dyna.actor.update != NULL)) {
             if ((this->unk_3BA / (f32)this->unk_3B8) <= 0.9f) {
                 door->unk_1A7 = this->unk_261;
@@ -1412,7 +1412,7 @@ s32 func_8095097C(EnGm* this, GlobalContext* globalCtx) {
     this->actor.world.pos.x = sp58.x;
     this->actor.world.pos.z = sp58.z;
 
-    if (func_8013AD6C(globalCtx)) {
+    if (SubS_InCsMode(globalCtx)) {
         sp54 = this->unk_254;
         sp50 = this->unk_250;
         sp58 = this->actor.world.pos;
@@ -1429,7 +1429,7 @@ s32 func_8095097C(EnGm* this, GlobalContext* globalCtx) {
         this->actor.world.rot.y = Math_Vec3f_Yaw(&sp70, &sp64);
     }
 
-    if (func_8013AD6C(globalCtx)) {
+    if (SubS_InCsMode(globalCtx)) {
         this->unk_254 = sp54;
         this->unk_250 = sp50;
         this->unk_238 = sp58;
@@ -1626,7 +1626,7 @@ void EnGm_Update(Actor* thisx, GlobalContext* globalCtx) {
             func_8094DFF8(this, globalCtx);
             func_8094E2D0(this);
             func_8094F2E8(this);
-            func_8013C964(&this->actor, globalCtx, this->unk_3B4, 30.0f, 0, this->unk_3A4 & 7);
+            func_8013C964(&this->actor, globalCtx, this->unk_3B4, 30.0f, EXCH_ITEM_NONE, this->unk_3A4 & 7);
             if ((this->unk_258 != 3) && (this->unk_258 != 5) && (this->unk_258 != 8)) {
                 Actor_MoveWithGravity(&this->actor);
                 Actor_UpdateBgCheckInfo(globalCtx, &this->actor, 30.0f, 12.0f, 0.0f, 4);
diff --git a/src/overlays/actors/ovl_En_Go/z_en_go.c b/src/overlays/actors/ovl_En_Go/z_en_go.c
index 57c8dc044..9a15d26f5 100644
--- a/src/overlays/actors/ovl_En_Go/z_en_go.c
+++ b/src/overlays/actors/ovl_En_Go/z_en_go.c
@@ -1926,10 +1926,10 @@ void EnGo_Update(Actor* thisx, GlobalContext* globalCtx) {
         } else {
             phi_f0 = this->colliderCylinder.dim.radius + 40;
         }
-        func_8013C964(&this->actor, globalCtx, phi_f0, 20.0f, 0, this->unk_390 & 7);
+        func_8013C964(&this->actor, globalCtx, phi_f0, 20.0f, EXCH_ITEM_NONE, this->unk_390 & 7);
     } else if ((this->unk_390 & 0x200) && (this->unk_3EC != 0)) {
         phi_f0 = this->colliderCylinder.dim.radius + 40;
-        func_8013C964(&this->actor, globalCtx, phi_f0, 20.0f, 0, this->unk_390 & 7);
+        func_8013C964(&this->actor, globalCtx, phi_f0, 20.0f, EXCH_ITEM_NONE, this->unk_390 & 7);
     }
 
     if ((ENGO_GET_F(&this->actor) != ENGO_F_8) && (ENGO_GET_F(&this->actor) != ENGO_F_2) &&
diff --git a/src/overlays/actors/ovl_En_Gs/z_en_gs.c b/src/overlays/actors/ovl_En_Gs/z_en_gs.c
index cfd252d07..37f56469d 100644
--- a/src/overlays/actors/ovl_En_Gs/z_en_gs.c
+++ b/src/overlays/actors/ovl_En_Gs/z_en_gs.c
@@ -154,8 +154,8 @@ void EnGs_Init(Actor* thisx, GlobalContext* globalCtx) {
 
     func_80997AFC(this->unk_194, &this->unk_1FA);
     this->unk_1F4 = this->unk_1FA;
-    Math_Vec3f_Copy(&this->unk_1B0[0], &D_801C5DB0);
-    Math_Vec3f_Copy(&this->unk_1B0[1], &D_801C5DB0);
+    Math_Vec3f_Copy(&this->unk_1B0[0], &gOneVec3f);
+    Math_Vec3f_Copy(&this->unk_1B0[1], &gOneVec3f);
     SubS_FillCutscenesList(&this->actor, this->unk_212, ARRAY_COUNT(this->unk_212));
     func_801A5080(0);
     if (this->actor.params == ENGS_1) {
@@ -183,8 +183,8 @@ void func_80997D38(EnGs* this, GlobalContext* globalCtx) {
 
     if (Message_GetState(&globalCtx->msgCtx) == 0) {
         if (this->actor.xzDistToPlayer <= D_8099A408[this->actor.params]) {
-            func_8013E8F8(&this->actor, globalCtx, D_8099A408[this->actor.params], D_8099A408[this->actor.params], 0,
-                          0x2000, 0x2000);
+            func_8013E8F8(&this->actor, globalCtx, D_8099A408[this->actor.params], D_8099A408[this->actor.params],
+                          EXCH_ITEM_NONE, 0x2000, 0x2000);
         }
     }
 
diff --git a/src/overlays/actors/ovl_En_Ig/z_en_ig.c b/src/overlays/actors/ovl_En_Ig/z_en_ig.c
index 7f847cf08..ed747c640 100644
--- a/src/overlays/actors/ovl_En_Ig/z_en_ig.c
+++ b/src/overlays/actors/ovl_En_Ig/z_en_ig.c
@@ -702,7 +702,7 @@ s32 func_80BF2470(EnIg* this, GlobalContext* globalCtx) {
     f32 temp;
     s32 pad;
 
-    if (!func_8013AD6C(globalCtx) && (this->unk_3EC != 0)) {
+    if (!SubS_InCsMode(globalCtx) && (this->unk_3EC != 0)) {
         if ((door != NULL) && (door->dyna.actor.update != NULL)) {
             if (((f32)this->unk_3E2 / this->unk_3E0) <= 0.9f) {
                 door->unk_1A7 = this->unk_2A4;
@@ -748,7 +748,7 @@ s32 func_80BF25E8(EnIg* this, GlobalContext* globalCtx) {
     this->actor.world.pos.x = sp58.x;
     this->actor.world.pos.z = sp58.z;
 
-    if (func_8013AD6C(globalCtx)) {
+    if (SubS_InCsMode(globalCtx)) {
         sp54 = this->unk_294;
         sp50 = this->unk_290;
         sp58 = this->actor.world.pos;
@@ -765,7 +765,7 @@ s32 func_80BF25E8(EnIg* this, GlobalContext* globalCtx) {
         this->actor.world.rot.y = Math_Vec3f_Yaw(&sp70, &sp64);
     }
 
-    if (func_8013AD6C(globalCtx)) {
+    if (SubS_InCsMode(globalCtx)) {
         this->unk_294 = sp54;
         this->unk_290 = sp50;
         this->unk_278 = sp58;
@@ -918,7 +918,7 @@ void EnIg_Update(Actor* thisx, GlobalContext* globalCtx) {
         func_80BF1258(this);
         func_80BF13E4(this);
         func_80BF15EC(this);
-        func_8013C964(&this->actor, globalCtx, 60.0f, 30.0f, 0, this->unk_3D0 & 7);
+        func_8013C964(&this->actor, globalCtx, 60.0f, 30.0f, EXCH_ITEM_NONE, this->unk_3D0 & 7);
         Actor_MoveWithGravity(&this->actor);
         Actor_UpdateBgCheckInfo(globalCtx, &this->actor, 30.0f, 12.0f, 0.0f, 4);
         func_80BF1354(this, globalCtx);
diff --git a/src/overlays/actors/ovl_En_Ja/z_en_ja.c b/src/overlays/actors/ovl_En_Ja/z_en_ja.c
index 392d8091e..5c57c883f 100644
--- a/src/overlays/actors/ovl_En_Ja/z_en_ja.c
+++ b/src/overlays/actors/ovl_En_Ja/z_en_ja.c
@@ -379,7 +379,7 @@ void EnJa_Update(Actor* thisx, GlobalContext* globalCtx) {
 
         radius = this->collider.dim.radius + 30;
         height = this->collider.dim.height + 10;
-        func_8013C964(&this->actor, globalCtx, radius, height, 0, this->unk_340 & 7);
+        func_8013C964(&this->actor, globalCtx, radius, height, EXCH_ITEM_NONE, this->unk_340 & 7);
 
         if (this->unk_1D8.unk_00 != 2) {
             Actor_MoveWithGravity(&this->actor);
diff --git a/src/overlays/actors/ovl_En_Pm/z_en_pm.c b/src/overlays/actors/ovl_En_Pm/z_en_pm.c
index 2736fc71a..21f9487ad 100644
--- a/src/overlays/actors/ovl_En_Pm/z_en_pm.c
+++ b/src/overlays/actors/ovl_En_Pm/z_en_pm.c
@@ -1086,7 +1086,7 @@ s32 func_80AF94AC(EnPm* this, GlobalContext* globalCtx, struct_80133038_arg2* ar
         if (arg2->unk0 == 24) {
             Flags_UnsetSwitch(globalCtx, 0);
             Flags_UnsetSwitch(globalCtx, 1);
-            this->unk_394 = 0;
+            this->unk_394 = EXCH_ITEM_NONE;
             this->unk_368 = 60.0f;
             func_80AF7E98(this, 9);
         }
@@ -1274,7 +1274,7 @@ s32 func_80AF9BF8(EnPm* this, GlobalContext* globalCtx, struct_80133038_arg2* ar
 
     this->actor.flags |= ACTOR_FLAG_1;
     this->actor.targetMode = 0;
-    this->unk_394 = 0;
+    this->unk_394 = EXCH_ITEM_NONE;
     this->unk_356 = 0;
     this->unk_368 = 40.0f;
 
@@ -1409,7 +1409,7 @@ s32 func_80AF9D04(EnPm* this, GlobalContext* globalCtx) {
     Vec3f* sp28;
     f32 temp;
 
-    if (!func_8013AD6C(globalCtx) && (this->unk_374 != 0)) {
+    if (!SubS_InCsMode(globalCtx) && (this->unk_374 != 0)) {
         if ((door != NULL) && (door->dyna.actor.update != NULL)) {
             if (((f32)this->unk_36E / this->unk_36C) <= 0.9f) {
                 door->unk_1A7 = this->unk_260;
@@ -1457,7 +1457,7 @@ s32 func_80AF9E7C(EnPm* this, GlobalContext* globalCtx) {
     this->actor.world.pos.x = sp58.x;
     this->actor.world.pos.z = sp58.z;
 
-    if (func_8013AD6C(globalCtx)) {
+    if (SubS_InCsMode(globalCtx)) {
         sp54 = this->unk_254;
         sp50 = this->unk_250;
         sp58 = this->actor.world.pos;
@@ -1474,7 +1474,7 @@ s32 func_80AF9E7C(EnPm* this, GlobalContext* globalCtx) {
         this->actor.world.rot.y = Math_Vec3f_Yaw(&sp70, &sp64);
     }
 
-    if (func_8013AD6C(globalCtx)) {
+    if (SubS_InCsMode(globalCtx)) {
         this->unk_254 = sp54;
         this->unk_250 = sp50;
         this->unk_238 = sp58;
diff --git a/src/overlays/actors/ovl_En_Shn/z_en_shn.c b/src/overlays/actors/ovl_En_Shn/z_en_shn.c
index 92d4c7514..0a717ff2b 100644
--- a/src/overlays/actors/ovl_En_Shn/z_en_shn.c
+++ b/src/overlays/actors/ovl_En_Shn/z_en_shn.c
@@ -380,7 +380,7 @@ void EnShn_Update(Actor* thisx, GlobalContext* globalCtx) {
     func_80AE6130(this);
     func_80AE63A8(this, globalCtx);
     this->unk_2E0 = 0;
-    func_8013C964(&this->actor, globalCtx, 120.0f, 40.0f, 0, this->unk_1D8 & 7);
+    func_8013C964(&this->actor, globalCtx, 120.0f, 40.0f, EXCH_ITEM_NONE, this->unk_1D8 & 7);
 }
 
 s32 EnShn_OverrideLimbDraw(GlobalContext* globalCtx, s32 limbIndex, Gfx** dList, Vec3f* pos, Vec3s* rot, Actor* thisx) {
diff --git a/src/overlays/actors/ovl_En_Suttari/z_en_suttari.c b/src/overlays/actors/ovl_En_Suttari/z_en_suttari.c
index dafed18c5..0503d0c56 100644
--- a/src/overlays/actors/ovl_En_Suttari/z_en_suttari.c
+++ b/src/overlays/actors/ovl_En_Suttari/z_en_suttari.c
@@ -758,7 +758,7 @@ s32 func_80BABFD4(EnSuttari* this, GlobalContext* globalCtx) {
     }
     this->actor.world.pos.x = sp58.x;
     this->actor.world.pos.z = sp58.z;
-    if (func_8013AD6C(globalCtx)) {
+    if (SubS_InCsMode(globalCtx)) {
         sp54 = this->unk424;
         sp50 = this->unk420;
         sp58 = this->actor.world.pos;
@@ -772,7 +772,7 @@ s32 func_80BABFD4(EnSuttari* this, GlobalContext* globalCtx) {
         sp64 = this->unk408;
         this->actor.world.rot.y = Math_Vec3f_Yaw(&sp70, &sp64);
     }
-    if (func_8013AD6C(globalCtx)) {
+    if (SubS_InCsMode(globalCtx)) {
         this->unk424 = sp54;
         this->unk420 = sp50;
         this->unk408 = sp58;
diff --git a/src/overlays/actors/ovl_En_Tab/z_en_tab.c b/src/overlays/actors/ovl_En_Tab/z_en_tab.c
index 48a1bc064..2d3ae2040 100644
--- a/src/overlays/actors/ovl_En_Tab/z_en_tab.c
+++ b/src/overlays/actors/ovl_En_Tab/z_en_tab.c
@@ -541,7 +541,7 @@ void EnTab_Update(Actor* thisx, GlobalContext* globalCtx) {
         radius = this->collider.dim.radius + this->unk_30C;
         height = this->collider.dim.height + 10;
 
-        func_8013C964(&this->actor, globalCtx, radius, height, 0, this->unk_2FC & 7);
+        func_8013C964(&this->actor, globalCtx, radius, height, EXCH_ITEM_NONE, this->unk_2FC & 7);
         Actor_MoveWithGravity(&this->actor);
         Actor_UpdateBgCheckInfo(globalCtx, &this->actor, 30.0f, 12.0f, 0.0f, 4);
         func_80BE0620(this, globalCtx);
diff --git a/src/overlays/actors/ovl_En_Tk/z_en_tk.c b/src/overlays/actors/ovl_En_Tk/z_en_tk.c
index 976a5ac31..830c86471 100644
--- a/src/overlays/actors/ovl_En_Tk/z_en_tk.c
+++ b/src/overlays/actors/ovl_En_Tk/z_en_tk.c
@@ -486,7 +486,7 @@ s32 func_80AECE60(EnTk* this, GlobalContext* globalCtx) {
     }
 
     if (!(this->unk_3CE & 8) && !(this->unk_2CA & 0x10) && (this->actor.xzDistToPlayer < 100.0f)) {
-        func_8013E8F8(&this->actor, globalCtx, 100.0f, 100.0f, 0, 0x4000, 0x4000);
+        func_8013E8F8(&this->actor, globalCtx, 100.0f, 100.0f, EXCH_ITEM_NONE, 0x4000, 0x4000);
     }
 
     return false;
@@ -695,7 +695,7 @@ void func_80AED940(EnTk* this, GlobalContext* globalCtx) {
         func_80AEDE10(this, globalCtx);
     } else if (!(this->unk_2CA & 0x80)) {
         if (this->actor.xzDistToPlayer < 100.0f) {
-            func_8013E8F8(&this->actor, globalCtx, 100.0f, 100.0f, 0, 0x4000, 0x4000);
+            func_8013E8F8(&this->actor, globalCtx, 100.0f, 100.0f, EXCH_ITEM_NONE, 0x4000, 0x4000);
         }
     } else {
         func_800B8500(&this->actor, globalCtx, this->actor.xzDistToPlayer, this->actor.playerHeightRel, 0);
diff --git a/src/overlays/actors/ovl_En_Tru/z_en_tru.c b/src/overlays/actors/ovl_En_Tru/z_en_tru.c
index ea0e8ae44..25c676cb6 100644
--- a/src/overlays/actors/ovl_En_Tru/z_en_tru.c
+++ b/src/overlays/actors/ovl_En_Tru/z_en_tru.c
@@ -1130,7 +1130,7 @@ void EnTru_Init(Actor* thisx, GlobalContext* globalCtx) {
     if (gSaveContext.save.weekEventReg[16] & 0x10) {
         func_80A86924(this, 5);
     } else {
-        this->unk_388 = 0;
+        this->unk_388 = EXCH_ITEM_NONE;
     }
 
     this->actionFunc = func_80A87FD0;
@@ -1156,7 +1156,7 @@ void EnTru_Update(Actor* thisx, GlobalContext* globalCtx) {
     func_80A86DB8(this);
 
     radius = this->collider.dim.worldSphere.radius + 30;
-    this->unk_388 = !(this->unk_34E & 0x80) ? 0 : 0;
+    this->unk_388 = !(this->unk_34E & 0x80) ? EXCH_ITEM_NONE : EXCH_ITEM_NONE;
 
     func_8013C964(&this->actor, globalCtx, radius, 20.0f, this->unk_388, this->unk_34E & 7);
     func_80A8697C(this, globalCtx);
diff --git a/src/overlays/actors/ovl_En_Zo/z_en_zo.c b/src/overlays/actors/ovl_En_Zo/z_en_zo.c
index 0f91171fb..8759d3b86 100644
--- a/src/overlays/actors/ovl_En_Zo/z_en_zo.c
+++ b/src/overlays/actors/ovl_En_Zo/z_en_zo.c
@@ -99,9 +99,9 @@ static AnimationInfoS sAnimations[] = {
     { &gZoraWalkAnim, 1.0f, 0, -1, ANIMMODE_LOOP, -4 },
 };
 
-s8 D_8099F578[] = { -1, 1, 12, 13, 14, 9, 10, 11, 0, 6, 7, 8, 3, 4, 5, 2, -1, -1, -1, -1 };
-s8 D_8099F58C[] = { 0, 0, 0, 0, 3, 4, 0, 6, 7, 0, 9, 10, 0, 12, 13 };
-u8 D_8099F59C[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+s8 sBodyParts[] = { -1, 1, 12, 13, 14, 9, 10, 11, 0, 6, 7, 8, 3, 4, 5, 2, -1, -1, -1, -1 };
+s8 sParentBodyParts[] = { 0, 0, 0, 0, 3, 4, 0, 6, 7, 0, 9, 10, 0, 12, 13 };
+u8 sShadowSizes[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 
 s32 EnZo_SetAnimation(SkelAnime* skelAnime, s16 index) {
     s16 frameCount;
@@ -310,8 +310,8 @@ void EnZo_PostLimbDraw(GlobalContext* globalCtx, s32 limbIndex, Gfx** dList, Vec
     Vec3f sp30 = { 400.0f, 0.0f, 0.0f };
     Vec3f zeroVec = { 0.0f, 0.0f, 0.0f };
 
-    if (D_8099F578[limbIndex] >= 0) {
-        Matrix_MultiplyVector3fByState(&zeroVec, &this->unk_364[D_8099F578[limbIndex]]);
+    if (sBodyParts[limbIndex] >= 0) {
+        Matrix_MultiplyVector3fByState(&zeroVec, &this->bodyPartsPos[sBodyParts[limbIndex]]);
     }
     if (limbIndex == 15) {
         Matrix_MultiplyVector3fByState(&sp30, &this->actor.focus.pos);
@@ -336,9 +336,9 @@ static Gfx sTransparencyDlist[] = {
 void EnZo_Draw(Actor* thisx, GlobalContext* globalCtx) {
     EnZo* this = THIS;
     s32 i;
-    u8* shadowTex = GRAPH_ALLOC(globalCtx->state.gfxCtx, sizeof(u8) * SQ(64));
+    u8* shadowTex = GRAPH_ALLOC(globalCtx->state.gfxCtx, SUBS_SHADOW_TEX_SIZE);
     u8* shadowTexIter;
-    TexturePtr eyeTextures[] = { &gZoraEyeOpenTex, &gZoraEyeHalfTex, &gZoraEyeClosedTex };
+    TexturePtr eyeTextures[] = { gZoraEyeOpenTex, gZoraEyeHalfTex, gZoraEyeClosedTex };
 
     OPEN_DISPS(globalCtx->state.gfxCtx);
     func_8012C28C(globalCtx->state.gfxCtx);
@@ -354,14 +354,15 @@ void EnZo_Draw(Actor* thisx, GlobalContext* globalCtx) {
                            EnZo_OverrideLimbDraw, EnZo_PostLimbDraw, &this->actor, POLY_OPA_DISP);
     Matrix_InsertXRotation_s(0, 0);
 
-    for (i = 0, shadowTexIter = shadowTex; i < (s32)sizeof(u8) * SQ(64); i++) {
+    for (i = 0, shadowTexIter = shadowTex; i < SUBS_SHADOW_TEX_SIZE; i++) {
         *shadowTexIter = 0;
         shadowTexIter++;
     }
     for (i = 0; i < 5; i++) {
-        func_8013CD64(this->unk_364, &this->actor.world.pos, shadowTex, i / 5.0f, 15, D_8099F59C, D_8099F58C);
+        SubS_GenShadowTex(this->bodyPartsPos, &this->actor.world.pos, shadowTex, i / 5.0f,
+                          ARRAY_COUNT(this->bodyPartsPos), sShadowSizes, sParentBodyParts);
     }
 
-    func_8013CF04(&this->actor, &globalCtx->state.gfxCtx, shadowTex);
+    SubS_DrawShadowTex(&this->actor, &globalCtx->state, shadowTex);
     CLOSE_DISPS(globalCtx->state.gfxCtx);
 }
diff --git a/src/overlays/actors/ovl_En_Zo/z_en_zo.h b/src/overlays/actors/ovl_En_Zo/z_en_zo.h
index 0b9f8dab1..155c947d4 100644
--- a/src/overlays/actors/ovl_En_Zo/z_en_zo.h
+++ b/src/overlays/actors/ovl_En_Zo/z_en_zo.h
@@ -30,7 +30,7 @@ typedef struct EnZo {
     /* 0x0300 */ UNK_TYPE1 unk_300[0x12];
     /* 0x0312 */ s16 limbRotY[20];
     /* 0x033A */ s16 limbRotZ[20];
-    /* 0x0364 */ Vec3f unk_364[15];
+    /* 0x0364 */ Vec3f bodyPartsPos[15];
     /* 0x041A */ UNK_TYPE1 unk_41A[0x6];
     /* 0x041E */ s16 eyeIndex;
     /* 0x0420 */ s16 blinkTimer;